package com.young.financial.utils;

import com.alibaba.fastjson.JSON;
import org.apache.http.NameValuePair;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * @anthor wenguoqiang
 * @date: 2019/01/16 15:44
 * @company
 * @des
 **/
@Component
public class HttpClientUtils {

        @Autowired
        private CloseableHttpClient httpClient;

        @Autowired
        private RequestConfig config;


        /**
         * 不带参数的get请求，如果状态码为200，则返回body，如果不为200，则返回null
         *
         * @param url
         * @return
         * @throws Exception
         */
        public String doGet(String url) throws Exception {
            // 声明 http get 请求
            HttpGet httpGet = new HttpGet(url);

            // 装载配置信息
            httpGet.setConfig(config);

            // 发起请求
            CloseableHttpResponse response = this.httpClient.execute(httpGet);

            // 判断状态码是否为200
            if (response.getStatusLine().getStatusCode() == 200) {
                // 返回响应体的内容
                return EntityUtils.toString(response.getEntity(), "UTF-8");
            }
            return null;
        }

    // 封装Httpclient请求
    public  String doPostJson(String url, String json) {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String resultString = "";
        try {
            // 创建Http Post请求
            HttpPost httpPost = new HttpPost(url);
            // 创建请求内容
            StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
            httpPost.setEntity(entity);
            // 执行http请求
            response = httpClient.execute(httpPost);
            resultString = EntityUtils.toString(response.getEntity(), "utf-8");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                response.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

        return resultString;
    }


        /**
         * 带参数的get请求，如果状态码为200，则返回body，如果不为200，则返回null
         *
         * @param url
         * @return
         * @throws Exception
         */
        public String doGet(String url, Map<String, Object> map) throws Exception {
            URIBuilder uriBuilder = new URIBuilder(url);
            System.out.println("url："+url+"参数："+ JSON.toJSONString(map));
            if (map != null) {
                // 遍历map,拼接请求参数
                for (Map.Entry<String, Object> entry : map.entrySet()) {
                    uriBuilder.setParameter(entry.getKey(), entry.getValue().toString());
                }
            }
            System.out.println("doGet参数uriBuilder"+uriBuilder.build().toString());
            // 调用不带参数的get请求
            return this.doGet(uriBuilder.build().toString());

        }

        /**
         * 带参数的post请求
         *
         * @param url
         * @param map
         * @return
         * @throws Exception
         *
         */
        public String doPost(String url, Map<String, Object> map) throws Exception {
            // 声明httpPost请求
            HttpPost httpPost = new HttpPost(url);
            // 加入配置信息
            httpPost.setConfig(config);

            // 判断map是否为空，不为空则进行遍历，封装from表单对象
            if (map != null) {
                List<NameValuePair> list = new ArrayList<NameValuePair>();
                for (Map.Entry<String, Object> entry : map.entrySet()) {
                    list.add(new BasicNameValuePair(entry.getKey(), entry.getValue()== null?"":entry.getValue().toString()));
                }
                // 构造from表单对象
                UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(list, "UTF-8");
                // 把表单放到post里
                httpPost.setEntity(urlEncodedFormEntity);
            }

            // 发起请求
            CloseableHttpResponse response = this.httpClient.execute(httpPost);
            return EntityUtils.toString(response.getEntity(), "UTF-8");
        }

        /**
         * 不带参数post请求
         *
         * @param url
         * @return
         * @throws Exception
         */
        public String doPost(String url) throws Exception {
            return this.doPost(url, null);
        }
    }

